Year % of total population 1960 50.1592603654958 1961 50.196360031274 1962 50.2341563239425 1963 50.2731825383157 1964 50.3115156215875 1965 50.3491290935036 1966 50.3868067153848 1967 50.4228344156102 1968 50.4556025687004 1969 50.4877829840301 1970 50.5169348590965 1971 50.5431053310132 1972 50.5689376979548 1973 50.5949439121869 1974 50.6205095572159 1975 50.6439857525104 1976 50.6611955051101 1977 50.6833818656906 1978 50.7125236000019 1979 50.7387572739794 1980 50.7687987301898 1981 50.7966478210862 1982 50.8205113021716 1983 50.8490523434435 1984 50.8711900457425 1985 50.8790620328152 1986 50.8751332307442 1987 50.8533518452594 1988 50.8246226312041 1989 50.8090878924122 1990 50.8173973684439 1991 50.836890117367 1992 50.8516344668445 1993 50.8494637251386 1994 50.8353272767374 1995 50.8045546110431 1996 50.7523689134233 1997 50.6958776643733 1998 50.6322361146924 1999 50.5607779463141 2000 50.4800627048596 2001 50.3925517762792 2002 50.2847208795075 2003 50.1514548118928 2004 50.0018401039995 2005 49.8332059481585 2006 49.6457083496943 2007 49.4450085546137 2008 49.2386114428546 2009 49.0276387549742 2010 48.8192709941956 2011 48.5948144454279 2012 48.3414581422631 2013 48.0794169651797 2014 47.8440546402377 2015 47.6736365834158 2016 47.5911865345574 2017 47.5662433658704 2018 47.547300439279 2019 47.530425392238 2020 47.6357718539951 2021 47.8474122297831 2022 47.9456834223857 2023 47.9417404962813